Question

Which fact was most likely discovered between the time of Mendeleev’s table and the time of Moseley’s table that helped Moseley develop his version? Atomic mass is the average mass of different samples of the same element. Different elements can have similar chemical properties even if their atomic masses are different. The number of protons in an atom is different than the atom’s total mass. Protons strongly affect an element’s atomic mass, while the electrons in atoms do not.

Answer 1

Answer:its option C

the number of protons in an atom is different than the atom’s total mass.

Step-by-step explanation:

Answer 2

The correct option is THE NUMBER OF PROTONS IN AN ATOM IS DIFFERENT FROM THE ATOM'S TOTAL MASS.
During the time Mendeleev developed his periodic table, scientists believed that the number of protons in an atom determine the mass of that atom. But withing the forty years that separated Mendeleev periodic table from Moseley periodic table it was found out that this was not so, this fact helped Moseley in his own work.